<template>
  <div class="app-container">
    <!-- $t is vue-i18n global function to translate lang -->
    <el-input :placeholder="$t('zip.placeholder')" prefix-icon="el-icon-document" style="width:300px;"
              v-model="filename"/>
    <el-button :loading="downloadLoading" @click="handleDownload" icon="document" style="margin-bottom:20px;"
               type="primary">{{ $t('zip.export') }} zip
    </el-button>
    <el-table :data="list" border element-loading-text="拼命加载中" fit highlight-current-row v-loading="listLoading">
      <el-table-column align="center" label="ID" width="95">
        <template slot-scope="scope">
          {{ scope.$index }}
        </template>
      </el-table-column>
      <el-table-column label="Title">
        <template slot-scope="scope">
          {{ scope.row.title }}
        </template>
      </el-table-column>
      <el-table-column align="center" label="Author" width="95">
        <template slot-scope="scope">
          <el-tag>{{ scope.row.author }}</el-tag>
        </template>
      </el-table-column>
      <el-table-column align="center" label="Readings" width="115">
        <template slot-scope="scope">
          {{ scope.row.pageviews }}
        </template>
      </el-table-column>
      <el-table-column align="center" label="Date" width="220">
        <template slot-scope="scope">
          <i class="el-icon-time"/>
          <span>{{ scope.row.display_time }}</span>
        </template>
      </el-table-column>
    </el-table>
  </div>
</template>

<script>
  import {fetchList} from '@/api/article'

  export default {
    name: 'ExportZip',
    data() {
      return {
        list: null,
        listLoading: true,
        downloadLoading: false,
        filename: ''
      }
    },
    created() {
      this.fetchData()
    },
    methods: {
      fetchData() {
        this.listLoading = true;
        fetchList().then(response => {
          this.list = response.data.items;
          this.listLoading = false;
        })
      },
      handleDownload() {
        this.downloadLoading = true;
        import('@/vendor/Export2Zip').then(zip => {
          const tHeader = ['Id', 'Title', 'Author', 'Readings', 'Date'];
          const filterVal = ['id', 'title', 'author', 'pageviews', 'display_time'];
          const list = this.list;
          const data = this.formatJson(filterVal, list);
          zip.export_txt_to_zip(tHeader, data, this.filename, this.filename);
          this.downloadLoading = false;
        })
      },
      formatJson(filterVal, jsonData) {
        return jsonData.map(v => filterVal.map(j => v[j]))
      }
    }
  }
</script>
